This BCA AR-15 complete 22 magnum length upper has a 16" heavy barrel with a black nitride finish, and features a 1:16 twist rate. It includes the new 15" MLOK rail, a M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 22 mag upper is compatible with any mil-spec AR-15 lower with an unnotched hammer (rounded) and this upper includes the buffer spring and buffer. (Our included buffer and spring are for a carbine style, adjustable stock)Magazine not included. Check out Magazines here!{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="56"}}*Note - We strive to provide the most accurate photographs of our product. Variations may occur in the skeletonized section of the handguard/flash hider you receive.{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}}It is the responsibility of the consumer to ensure all state, local, federal, and ITAR regulations are followed